Places for kids to publish web pages.
Kidsville.net
http://www.kidsville.net/
No ads and an easy editor that also helps learn about HTML by specifying all the formatting details

Express Page
http://www.expage.com
No signup. Just name your page, use the easy editor, and you are on the web!

Hometown AOL
http://hometown.aol.com
AOL's tried and true editor but you must have an AOL screen name from an account or from using IM